Flash Flood Warning 32, NWS Baltimore/Washington

Issued

Sep 3, 2000, 10:59 AM EDT (14:59 UTC)

Expired

Sep 3, 2000, 1:00 PM EDT

In force

2 hr

Issued by

NWS Baltimore/Washington

Area

Whole counties; the outline is the Mesonet’s reconstruction

County Albemarle County, VA

The Sterling radar (KLWX), 147 km from the middle of the area, began a volume at 15:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

000 
WGUS51 KLWX 031508
FFWLWX
VAC003-031700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
1059 AM EDT SUN SEP 3 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN ALBEMARLE COUNTY IN CENTRAL VIRGINIA

* UNTIL 100 PM EDT

* AT 1055 AM EDT...DOPPLER RADAR SHOWED A PERSISTENT AREA OF SHOWERS
  AND THUNDERSTORMS OVER WESTERN ALBEMARLE COUNTY NEAREST THE TOWNS OF
  CROZET AND WHITE HALL. THE STORMS WERE NEARLY STATIONARY OR
  DRIFTING SLOWLY NORTHWEST. RADAR ESTIMATES INDICATE RAINFALL RATES
  OF 1 TO 2 INCHES PER HOUR AND THESE SHOWERS HAVE PERSISTED OVER
  THE WESTERN THIRD OF THE COUNTY IN VARYING INTENSITIES SINCE
  JUST AFTER 7 AM THIS MORNING. THE SHOWERS MAY PERSIST FOR ANOTHER
  HOUR OR TWO BEFORE FINALLY DISSIPATING OR MOVING OUT BY EARLY
  AFTERNOON.

* AT 1045 AM EDT...SHERIFFS DEPUTIES RECEIVED REPORTS OF FLOODING ON
  ROUTE 810 IN THE NORTHWEST PART OF THE COUNTY.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...OTHER POOR DRAINAGE OR LOW LYING
AREAS.

IF WATER IS FLOWING ACROSS A ROADWAY TURN YOUR VEHICLE AROUND AND
FIND AN ALTERNATE ROUTE. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW
YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. IF YOU
ENCOUNTER WATER FLOWING ACROSS BRIDGES...DIPS...OR OTHER LOW SPOTS
TURN AROUND AND FIND AN ALTERNATE ROUTE. NEVER TRY TO CROSS A FLOWING
STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP
TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID
CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

LAT...LON 3800 7880 3802 7859 3822 7859 3809 7878

JLW/MM/JD

NWS Baltimore/Washington wrote its last area forecast discussion before this flash flood warning went out at Sep 3, 3:15 AM EDT, 7 hours 44 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
315 AM EDT SUN SEP 3 2000

KLWX RADAR SHOWING A LARGE AREA OF SHOWERS AND THUNDERSTORMS OVER
SOUTH CENTRAL VA... MOVING NNE TOWARD THE NORTHERN NECK AND FAR
SOUTHERN MD.  OTHER SHOWERS BEGINNING TO BREAK OUT JUST TO THE SOUTH
OF IAD AREA. SKIES MAINLY CLOUDY... WITH A FEW THIN SPOTS SHOWING UP
ON THE IR LOOP OVER CENTRAL AND WESTERN MD.

MODELS IN GENERAL AGREEMENT WITH OVERALL PATTERN TODAY AND TONIGHT.
WEAK SHORT WAVE SHOWING UP OVER NC AND SOUTHERN VA ON LATEST WV
IMAGE. 00Z ETA AND 06Z RUC HAVE PICKED UP THIS WAVE... AND THEY BOTH
ROTATE IT SLOWLY SLOW THE AREA THIS AFTERNOON. LOW LEVEL CONVERGENCE
BOUNDARY SETTING UP OVER NWRN EDGE OF CWA... WITH MOIST
SOUTHEASTERLY FLOW CONTINUING OVER THE AREA. SHORT WAVE SHOULD HELP
FOCUS SHOWER AND THUNDERSTORM ACTIVITY OVER OUR CWA TODAY...
ESPECIALLY THE SOUTHEASTERN HALF. EXPECTING PRECIP TO BE MORE
WIDESPREAD TODAY THAN IT HAS BEEN THE PAST COUPLE OF DAYS BECAUSE OF
THIS FEATURE. AMS STILL RATHER MOIST.. WITH ETA FORECAST PW VALUES
BETWEEN 1.75 AND 2.00 INCHES TODAY. STEERING FLOW REMAINS RATHER
LIGHT.. SO WHERE SHOWERS AND STORMS DO DEVELOP THEY HAVE THE
POTENTIAL TO PRODUCE SOME HEAVY RAINFALL. 1-HOUR FFG VALUES STILL
OVER 2 INCHES FOR MOST OF THE AREA.. SO THREAT OF WIDESPREAD FLASH
FLOODING APPEARS MINIMAL. EXCEPTION TO THIS IS THE CENTRAL
SHENANDOAH VALLEY... WHERE FFG VALUES ARE BETWEEN 0.9 AND 1.5
INCHES. WILL ISSUE FFA TODAY AND TONIGHT FOR THE FAR SW CORNER OF
THE CWA.. WHERE FFG VALUES ARE LOWER.

LIGHT WESTERLY/NORTHWESTERLY FLOW BEGINNING TO MIX DOWN OVER THE
AREA ON MONDAY... AND THIS SHOULD BRING ENOUGH DRY AIR DOWN TO THE
SURFACE TO KEEP POPS IN CHANCE CATEGORY. SURFACE FRONT EXPECTED TO
MOVE THROUGH THE AREA MONDAY NIGHT SHOULD BRING AN END TO THE PRECIP
FOR A FEW DAYS. ETA/NGM ARE 6-12 HOURS SLOWER AT USHERING IN COOLER
AIR THAN AVN... AND PLAN TO STICK TO WARMER ETA/NGM FOR MONDAY NIGHT
AND TUESDAY FORECAST TEMPS.

.LWX...
DC...NONE.
MD...NONE.
VA...FLASH FLOOD WATCH TODAY AND TONIGHT VAZ021-025>026-036>039.
WV...FLASH FLOOD WATCH TODAY AND TONIGHT WVZ054.

MARGRAF!

Flash Flood Warnings in Virginia, 2000Every flash flood warning in 2000

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.